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Given the composition of the steels HAP40 should easily surpass R2. This is with optimal heat treatment and minimal grain growth. Lastly would be blade geometry and intended task of the blade. Get any part of that wrong and it all becomes a guessing game.

mano

Post subject: Re: HAP40 vs R2

Posted: Fri Apr 25, 2014 3:47 pm

Joined: Wed May 02, 2012 12:22 amPosts: 105

Are ZDP189 and M390 the same? IIRC the ZDP189 blade I owned was difficult to shapen, but then kept a good edge.

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